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Nuclear Theory·nucl-th

Monday·October 3, 2022

6 papers—2 primary·4 cross-listed

All6Primary2Cross-lists4
  1. 01

    Collectivity in ultra-peripheral heavy-ion collisions

    Chun Shen🇺🇸 · Wenbin Zhao🇺🇸 · Björn Schenke🇺🇸

    We present full (3+1)D dynamical simulations to study collective behavior in ultra-peripheral nucleus-nucleus collisions (UPC) at the Large Hadron Collider (LHC) with the 3DGlauber+MUSIC+UrQMD framework. By extrapolating from asymmetric p+Pb collisions, we simulate a quasi-real photon interacting with the Pb nucleus in an ultra-peripheral collision at the LHC, assuming strong final-state effects. We study the elliptic flow hierarchy between p+Pb and +Pb collisions, which is dominated by the difference in longitudinal flow decorrelations. Our theoretical framework provides a quantitative tool to study collectivity in small asymmetric collision systems at current and future collider experiments.

    nucl-thhep-phnucl-exEPJ Web Conf.(2023)·3 citations
  2. 02

    Applications of Persistent Homology in Nuclear Collisions

    Greg Hamilton🇺🇸 · Travis Dore🇺🇸 · Christopher Plumberg🇺🇸

    We introduce a novel set of observables associated to the rapidly developing field of persistent homology for the quantitative characterization of nuclear collisions and their evolution. Persistent homology allows for the identification of topological and homological characteristics of distributions in multi-dimensional spaces. We demonstrate here how to apply the toolset of persistent homology to the extraction of novel clustering signatures and the identification of long-range flow correlations in the particle production process of nuclear collisions.

    nucl-thnucl-exPRC(2022)·6 citations
  3. 03

    Laser Spectroscopy for the Study of Exotic Nuclei

    X. F. Yang🇨🇳 · S. J. Wang🇨🇳 · S. G. Wilkins🇺🇸 · R. F. Garcia Ruiz🇺🇸

    Investigation into the properties and structure of unstable nuclei far from stability remains a key avenue of research in modern nuclear physics. These efforts are motivated by the continual observation of unexpected structure phenomena in nuclei with unusual proton-to-neutron ratios. In recent decades, laser spectroscopy techniques have made significant contributions in our understanding of exotic nuclei in different mass regions encompassing almost the entire nuclear chart. This is achieved through determining multiple fundamental properties of nuclear ground and isomeric states, such as nuclear spins, magnetic dipole and electric quadrupole moments and charge radii, via the measurement of hyperfine structures and isotope shifts in the atomic or ionic spectra of the nuclei of interest. These properties, when measured with sufficient precision for a long range of isotopes, offer prominent tests of recently developed state-of-the-art theory and help to stimulate new developments to improve the many-body methods and nucleon-nucleon interactions at the core of these models. With the aim of exploring more exotic short-lived nuclei located ever closer to the proton and neutron driplines, laser spectroscopy techniques, with their continuous technological developments towards higher resolution and higher sensitivity, are extensively employed at current- and next-generation radioactive ion beam facilities worldwide. Ongoing efforts in parallel promise to make even more exotic species available for study at next-generation facilities. Very recently, an innovative application of laser spectroscopy on molecules containing short-lived nuclei has been demonstrated offering additional opportunities for several fields of research, e.g. fundamental symmetry studies and astrophysics.

    ↳ nucl-exnucl-thPPNP(2023)·154 citations
  4. 04

    Impact of nuclear structure from shell model calculations on nuclear responses to WIMP elastic scattering for F and Xe targets

    Raghda Abdel Khaleq🇦🇺 · Cedric Simenel🇦🇺 · Andrew E. Stuchbery🇦🇺

    Non-relativistic effective field theory (NREFT) is one approach used for describing the interaction of WIMPs with ordinary matter. Among other factors, these interactions are expected to be affected by the structure of the atomic nuclei in the target. The sensitivity of the nuclear response components of the WIMP-nucleus scattering amplitude is investigated using shell model calculations for F and Xe. Resulting integrated nuclear response values are shown to be sensitive to some specifics of the nuclear structure calculations.

    ↳ hep-phnucl-thSciPost Phys.Proc.(2023)·2 citations
  5. 05

    NLO finite system size corrections to scattering in theory using newly derived sum of sinc functions

    J.F. Du Plessis🇿🇦 · W. A. Horowitz🇿🇦

    Previously an equation of state for the relativistic hydrodynamics encountered in heavy-ion collisions at the LHC and RHIC has been calculated using lattice gauge theory methods. This leads to a prediction of very low viscosity, due to the calculated trace anomaly. Finite system corrections to this trace anomaly could challenge this calculation, since the lattice calculation was done in an effectively infinite system. In order to verify this trace anomaly it is sensible to add phenomenologically relevant finite system corrections. We investigate massive theory with periodic boundary conditions on of the 3 spatial dimensions. NLO scattering is then computed. Using a newly derived formula for an arbitrary dimensional sum of sinc functions, we show that the NLO finite size corrections preserve unitarity.

    ↳ hep-thnucl-thSciPost Phys.Proc.(2024)·0 citations
  6. 06

    Effect of dipole size fluctuations on diffractive photo-production of vector mesons

    Jean-Paul Blaizot🇫🇷 · Marco Claudio Traini🇮🇹

    We consider the diffractive photo-production of vector mesons on a proton, in the dipole model. We take into account the effect of the fluctuations of the the dipole size, whose magnitude is controlled by the overlap between the photon and the vector meson wave functions. Our predictions for the incoherent diffractive cross section, obtained within the Impact Parameter Saturation Model (IPSat), are shown to be in excellent agreement with the HERA data on photo-production, down to very low momentum transfer, where the dipole size fluctuations are shown to play an essential role. This study complements, without introducing any additional parameter, previous treatments of incoherent diffractive processes in terms of fluctuations of the proton shape, by adding another source of ``geometrical'' fluctuations, namely those coming from the splitting of the photon into color dipoles of various sizes.

    ↳ hep-phnucl-th6 citations

Affiliations

first authorsco-authorsvia INSPIRE